I have one that is similar to the one I will post in the link below. It works good enough for my camper needs. And, because it is also a AM FM radio I can take it with me to listen to music and regular radio programs. I do wish it had SAME technology so that it would only go off when there is a storm close by to me but, it works good enough.
http://www.amazon.com/Digital-NOAA-Radio-Dual-Alarms/dp/B004PFG5KU/ref=sr_1_sc_4?ie=UTF8&qid=1432921766&sr=8-4-spell&keywords=colby+weather+alert+radio